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Swiss Developing Satellites to Clear Orbital Debris:

CleanSpace One is a project aimed at building a prototype for a family of satellites that would chase down and capture small pieces of orbital debris. NASA is currently tracking some 16,000 pieces of junk larger than about four inches diameter, but the agency estimates there are many more times that ripping around the planet at orbital speeds (call it 17,500 miles per hour).

Each one is a disaster waiting to happen; orbital debris threatens satellites, spacecraft, and astronauts moving within and through its orbit, potentially costing lots of money or even human lives. All kinds of proposals for dealing with the problem—everything from trash collecting satellites to ground based lasers that would zap orbital debris from the sky—have been put forward, but so far nothing has gained traction.

EPFL (that’s the École Polytechnique Fédérale de Lausanne) hopes to change that. CleanSpace One would not be a massive trash-collecting satellite, but a tiny trash-chaser designed to destroy exactly one piece of debris. The first target will be one of two small Swiss picosatellites launched in 2009 and 2010 that are still in orbit up there though their scientific missions are done. CleanSpace One would track down one of the satellites in its orbit, latch onto it with some kind of gripper, and drag it back into Earth’s atmosphere where both would burn up on re-entry.

(via Video: The Swiss are Developing a Family of Small Satellites to Tidy Up Junk in Orbit | Popular Science)